MERIT SERIES Downflow
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1 PRODUCT SPECIFICATIONS GAS FURNACES ML95DF MERIT SERIES Downflow Bulletin No. 06 February 08 Supersedes November 07 MODEL NUMBER IDENTIFICATION AFUE - 95% Input - 44,000 to 0,000 Btuh Nominal Add-on Cooling - to 5 Tons ML 95 DF 070 X P 6 B Unit Type ML = Merit Series Stages = One-Stage AFUE 95 = 95% Configuration DF = Downflow Nominal Gas Heat Input 045 = 44,000 Btuh 070 = 66,000 Btuh 090 = 88,000 Btuh 0 = 0,000 Btuh Cabinet Width B = 7-/ in. C = in. Nominal Add-On Cooling Capacity 6 = tons 60 = 5 tons Blower P = PSC Multi-Speed Blower Motor Low NO x X = Units meet California Nitrogen Oxides Standard (40ng/J) Downflow indoor coils with the same letter designation will physically match the furnace supply air opening.
2 FEATURES CONTENTS G Blower Data... 6 Dimensions... 0 Features... H Gas Heat Accessories... 7 A High Altitude Derate... 8 I Installation Clearances... 6 Model Number Identification... Optional Accessories... 7 C Optional Accessory Dimensions... Specifications... 6 Vent Lengths... 9 WARRANTY Duralok Plus Aluminized Steel Heat Exchanger Limited twenty-year warranty in residential applications, ten years in non-residential applications. All Other Covered Components - Limited five-year warranty in residential applications, one year in nonresidential applications. Refer to Lennox Equipment Limited Warranty certificate included with equipment for details. APPROVALS Units are AHRI Certified. Units tested and rated according to US DOE test procedures and FTC labeling regulations. Blower data from unit tests conducted in Lennox Laboratory air test chamber. Approved by the California Energy Commission and meets California Nitrogen Oxides Standard (NOx) limits of 40 ng/j. ISO 900 Registered Manufacturing Quality System. APPLICATIONS Input capacities of 44,000, 66,000, 88,000 and 0,000 Btuh. Energy efficiency (AFUE) 95%. Lennox add-on indoor coils, high-efficiency air cleaners and humidifiers can easily be added to furnace. Shipped factory assembled with controls installed and wired. Each unit factory test operated to ensure proper operation. ML95DF / Page J F E B K D HEATING SYSTEM B Lennox Duralok Plus Heat Exchanger Assembly Lennox developed heat exchanger assembly consists of primary heat exchanger and secondary condenser coil assembly. Main multi-pass crimped seam design clamshell type heat exchanger. Constructed of heavy-gauge, aluminized-steel. Designed for normal expansion and contraction with maximum efficiency and minimum resistance to air flow. C Secondary heat exchanger condenser coil constructed of aluminum fins fitted to stainless steel tubes. Coil is factory tested for leaks. Condensate drain header box assembly located on front of coil. Compact size of complete heat exchanger assembly permits low overall design of furnace cabinet. Heat exchanger assembly has been laboratory life cycle tested in excess of industry standards. Lennox Designed Header Box Header box on end of condenser coil collects flue condensate for disposal through condensate drains. The drains are located on each side of the cabinet for easy field installation of condensate drain trap. Only one drain is used, the other drain is sealed. Condensate drain trap is included with unit for field installation.
3 FEATURES D E F HEATING SYSTEM (continued) Lennox Designed Flue Condensate Trap Assembly Condensate trap assembly is mounted outside the conditioned air stream. Assembly can be mounted on either side of cabinet. See Installation Instructions. Can also be mounted remotely (up to 5 ft. away) from unit. 90 street elbow furnished for ease of drain trap installation. Drain connection can be made with field provided PVC pipe or PVC coupling. Drain cap on trap allows easy cleaning and winterizing. Inshot Burners Aluminized steel inshot burners provide efficient, trouble-free operation. Burner venturi mixes air and gas in correct proportion for proper combustion. Burner assembly is removable from the unit as a single component for ease of service. SureLight Integrated Furnace Control Tough, reliable, long-life, trouble-free performance. Silicon nitride ignitor. Cemented to steatite block for protection against current leakage. Ignition leads are constructed of nickel plated copper and are enclosed in high temperature Teflon insulation for dependable operation. Gas Control Valve 4 volt redundant combination gas control valve combines manual shut off switch (On-Off), automatic electric valve (dual) and gas pressure regulation into a compact combination control. Flame Rollout Switches () Manual reset switches are factory installed on the front of the burner box. Switch provides protection from abnormal operating conditions. Limit Control Automatic reset, primary limit is accurately located on header box on all units. Combustion Air Inducer Shaded pole heavy duty blower prepurges heat exchanger and safely vents flue products. Operates only during heating cycle. Pressure Switch Proves Combustion Air Inducer operation before allowing gas valve to open. G Optional Accessories 6K Derate Kit (045 models only) Allows 045 (44K input) models input to be reduced to 6K. For use with natural gas only. High Altitude Orifice Kits Required on all units for proper operation at altitudes from 750 to 0,000 ft. Kits are available for natural gas and LPG/propane. High Altitude Pressure Switch Kit Required for proper unit operation on installations above 4500 ft. Natural Gas to LPG/Propane Conversion Kit Required for field changeover from natural gas to LPG/ Propane. LPG/Propane to Natural Gas Conversion Kit Required for field changeover from LPG/Propane to natural gas. Muffler (US Only) Significantly reduces outdoor operating sound levels. Two-inch diameter muffler is optional for 045 through 0 input models. NOTE - Two-inch muffler is optional for the 0 input model with a maximum vent pipe length of up to 9 ft. Three-inch diameter muffler is optional for 0 input models. NOTE - Three-inch muffler is optional for the 0 input model with a minimum vent pipe length of 0 ft. Installed vertically in the exhaust piping. See Optional Accessory Dimension Drawing. DIRECT VENT / NON-DIRECT VENT SEALED COMBUSTION SYSTEM Furnace features a sealed combustion system and can be installed in either Direct Vent or Non-Direct applications. In Direct Vent applications, combustion air is supplied from outdoors and flue gases are discharged outdoors. In Non-Direct Vent applications, combustion air is supplied from indoors and flue gases are discharged outdoors. NOTE - Lennox has approved the use of DuraVent PolyPro and Centrotherm InnoFlue manufactured vent pipe and terminations as an alternative to PVC vent pipe. Must be ordered separately. Tested and listed to the ULC S66 standard in Canada. The polypropylene venting system must follow the uninsulated and unconditioned space vent lengths listed in the table on Page 8. Refer to the Installation Instructions for additional details. ML95DF / Page
4 FEATURES DIRECT VENT / NON-DIRECT VENT SEALED COMBUSTION SYSTEM (continued) Optional Accessories Termination Kits Facilitates installation of combustion air intake pipe and flue exhaust pipe. Refer to venting table in this bulletin to determine pipe size needed and proper termination kit required. See Optional Accessories table and dimension drawings. Termination Kit - Concentric - Direct Vent Applications or inch kit contains concentric termination assembly, reducer bushing and 45 degree elbow. inch kit for models contains an outdoor exhaust accelerator. Kit requires single hole penetration of roof or wall for installation. Roof Termination Flashing Kit is available for use with inch Kits. CSA certified. Termination Kit - Flush-Mount Kit contains flush-mount termination, accelerator, mounting template and hardware. Kit may be used with, -/ or in. pipe. Termination Kits - Wall Assembly Close Couple (US Only) - Direct Vent Applications or inch kit consists of close-couple, side-by-side PVC piping with galvanized steel wall cover plate for sealing and isolating piping penetration of the wall. Piping spacing and length is sized for proper wall installations. CSA certified. Close Couple WTK (Canada Only) - Direct Vent Applications or inch kit contains one insulated faceplate, one insulated exhaust pipe, elbow and fittings. Wall Ring - Direct Vent or Non-Direct Vent Applications inch kit contains stainless steel outside seal caps, galvanized steel inside seal caps, 4 seal rings for the caps and 8 inch insulation sleeve for sealing and isolating intake and exhaust piping penetration of wall. Maintain a maximum of 6 inches between the inlet and outlet openings in the installation of the pipes. Roof Termination Flashing Kit - Direct Vent or Non-Direct Vent Applications or inch kit contains two neoprene rubber roof flashings for vertical venting through a roof. Vent pipe and insulation not furnished. H I Also available for use with inch (use inch flashing) Concentric Vent Termination Kits used in vertical venting rooftop applications. BLOWER Multi-speed direct drive blower. Statically and dynamically balanced. Resiliently mounted. Blower assembly easily removed for servicing. Blower speeds are easily changed on the integrated furnace control. See Blower Data tables. CONTROLS Integrated Furnace Control Contains all necessary controls and relays to operate furnace. Combustion air inducer is controlled by the integrated furnace control. Prior to ignition, a pre-purge cycle for 5 seconds is initiated. After the main burners are turned off, a post-purge cycle for 5 seconds is run. Integrated furnace control continuously monitors line voltage and maintains the igniter power at a constant level to provide consistent lighting and maximum igniter life. Flame sensor assures safe and reliable operation. Should loss of flame occur, flame sensor controls will initiate 4 re-attempts at ignition before locking out unit operation for 60 minutes. Watchguard type circuit automatically resets ignition controls after one hour of continuous thermostat demand after unit lockout, eliminating nuisance calls for service. Fan control consists of adjustable blower timed-off delay (60, 90, 0, 80 seconds - factory setting 0 seconds) and fixed blower timed-on delay (0 seconds heating, seconds cooling). For air-conditioning applications, blower is automatically energized on thermostat demand for cooling. Integrated furnace control has one red LED to indicate status and indicate diagnostic codes. Push button recall of the last 5 diagnostic codes aids in troubleshooting. Integrated furnace control has built-in twinning capability ( TWIN terminal on control) to operate two furnaces simultaneously without any additional controls. A field supplied isolation relay is required to operate the twinned (no thermostat connection) furnace. Two accessory terminals furnished for additional power supply requirements for 0 volt (less than amp) power humidifiers and powered air cleaners. 4 Volt Transformer Furnished and factory installed in control box. 40VA transformer has fuse wired in series. ML95DF / Page 4
5 J K FEATURES CONTROLS (continued) Field Wiring Make-Up Box Furnished for line voltage wiring. Factory installed internally on left side of furnace. Box may be installed internally or externally on either side of furnace. Optional Accessories Thermostat Thermostat (programmable/non-programmable) is not furnished with unit. See Thermostat bulletins in Controls Section and Lennox Price Book for selection. Night Service Kit Contains most commonly used service parts: Furnace control Igniter Flame sensor Gas valve Transformer Service Manual CABINET Low-profile, narrow width cabinet allows easy installation in downflow applications. Heavy-gauge, cold rolled steel construction. Pre-painted cabinet finish. Flanges provided on supply air opening for ease of plenum connection or alignment with indoor coil. Cabinet is insulated with foil faced insulation on sides and back of heating compartment. Sealed blower compartment. Complete service access. Safety interlock switch automatically shuts off power to unit when blower compartment access door is removed. Gas piping and electrical inlets are provided in both sides of cabinet. Optional Accessories Condensate Drain Heat Cable Kits Self-limiting wattage heat cable prevents condensate drain from freezing in unconditioned areas. Available in 6 or 4 ft. lengths. Crawl Space Vent Drain Kit Allows venting through a crawl space for downflow applications. Includes or in. sanitary tee, in. PVC assembly, PVC boot and clamp. Kit for Canada is certified to ULC S66. Downflow Combustible Flooring Base Required for heating only units installed on combustible floors. Not required in add-on cooling applications. See Dimension Drawing. FILTER (not furnished) Filter and provisions for external mounting must be field provided. Optional Accessories Downflow Filter Cabinet Filter cabinet mounts directly on top of furnace. B and C width cabinets have two filters. Filter rails are furnished. Front access for servicing. Cleanble filter(s) are furnished. Coil Match-Up All Lennox downflow indoor coils will physically match the furnace supply air opening with the same letter designation (A, B, C, D) as in the furnace model number. Low Leakage Cabinet All models have less than % air leakage and meet ANSI/ASHRAE Standard 9-00 Method of Test for Determining the Air Tightness of HVAC Equipment. ML95DF / Page 5
6 SPECIFICATIONS Gas Heating Performance Model No. ML95DF045XP6B ML95DF070XP6B ML95DF090XP60C ML95DF0XP60C AFUE 95% 95% 95% 95% Input - Btuh 44,000 66,000 88,000 0,000 Output - Btuh 4,000 64,000 86,000 06,000 Temperature rise range - F Gas Manifold Pressure (in. w.g.) Nat. Gas / LPG/Propane.5 / / / / 0.0 High static - in. w.g Connections in. Intake / Exhaust Pipe (PVC) / / / / Gas pipe size IPS / / / / Condensate Drain Trap (PVC pipe) - i.d. /4 /4 /4 /4 with furnished 90 street elbow /4 slip x /4 Mipt /4 slip x /4 Mipt /4 slip x /4 Mipt /4 slip x /4 Mipt with field supplied (PVC coupling) - o.d. /4 slip x /4 MPT /4 slip x /4 MPT /4 slip x /4 MPT /4 slip x /4 MPT Indoor Blower Wheel nom. dia. x width - in. 0 x 8 0 x 8 ½ x 0 ½ x 0 Motor output - hp / / Tons of add-on cooling - tons Air Volume Range - cfm Electrical Data Voltage 0 volts - 60 hertz - phase Blower motor full load amps Maximum overcurrent protection Shipping Data lbs. - package NOTE - Filters and provisions for mounting are not furnished and must be field provided. Annual Fuel Utilization Efficiency based on DOE test procedures and according to FTC labeling regulations. Isolated combustion system rating for non-weatherized furnaces. INSTALLATION CLEARANCES Sides Rear Top/Plenum Front Front (service/alcove) Floor 0 inches (0 mm) 0 inches (0 mm) inch (5 mm) 0 inches (0 mm) 4 inches (60 mm) Combustible NOTE - Air for combustion must conform to the methods outlined in the National Fuel Gas Code (NFPA 54/ ANSI-Z.) or the National Standard of Canada CAN/CSA-B49. Natural Gas and Propane Installation Code. NOTE - In the U.S. flue sizing must conform to the methods outlined in the current National Fuel Gas Code (NFPA 54/ANSI-Z.) or applicable provisions of local building codes. In Canada flue sizing must conform to the methods outlined in National Standard of Canada CAN/CSA-B49.. Allow proper clearances to accommodate condensate trap and vent pipe installation. Clearance for installation on combustible floor if Optional Downflow Combustible Flooring Base is installed between furnace and combustible floor. Not required in add-on cooling applications if installed in accordance with local codes or National Fuel Gas Code ANSI-Z. or CAN/CGA 49.,.. Do not install the furnace directly on carpeting, tile, or other combustible materials other than wood flooring. ML95DF / Page 6
7 OPTIONAL ACCESSORIES - ORDER SEPARATELY CABINET ACCESSORIES B Width Models C Width Models Downflow Combustible Flooring Base M60 M6 CONDENSATE DRAIN KITS Condensate Drain Heat Cable 6 ft. 6K68 6K68 4 ft. 6K69 6K69 Crawl Space Vent Drain Kit US 5W8 5W8 DOWNFLOW FILTER KITS Canada 5Z70 5Z70 Downflow Filter Cabinet 5W07 5W08 NIGHT SERVICE KIT No. and Size of filter - in. () 6 x 0 x () 6 x 0 x Night Service Kit 68W80 68W80 TERMINATION KITS See Installation Instructions for specific venting information. Termination Kits - Direct Vent Applications Only Termination Kits - Direct or Non-Direct vent Concentric US - in. 7M80 69M9 in L46 Canada - in. 44W9 44W9 in W9 Flush-Mount US -, -/ or in. 5W 5W Wall - Close Couple Wall - Close Couple WTK Canada -, -/ or in. 5W 5W US - in. G in. 44J40 44J40 Canada - in. 0G in. 8J0 8J0 Roof in. 5F75 5F75 Wall Ring Kit in. 5F74 5F74 Roof Termination Flashing Kit - Direct or Non-Direct Vent - Contains two flashings Cleanable polyurethane frame type filter. Kits contain enough parts for two, non direct vent installations. Non-direct vent only. NOTE - Termination Kits (44W9, 44W9, 0G8, 5W, 8J0) and Crawl Space Vent Drain Kit (5Z70) are certified to ULC S66 standard for use in Canada only. 44J4 44J4 GAS HEAT ACCESSORIES Input High Altitude Pressure Switch Kit Natural Gas to LPG/Propane Kit LPG/Propane to Natural Gas Kit Natural Gas High Altitude Orifice Kit LPG/Propane High Altitude Orifice Kit 6K Derate Kit (Naturual Gas) Muffler (US Only) ft ft ft. 0,000 ft. 0,000 ft. 0,000 ft. 0-0,000 ft. 045 No Change U65 K49 7W8 7W7 K44 0K55 5Y66 (-inch) 070 U7 U64 K49 7W8 7W7 K Y66 (-inch) 090 U70 U64 K49 7W8 7W7 K Y66 (-inch) 0 U7 U64 K49 7W8 7W7 K NOTE - 6K Derate Kit Information - Reduced Input is 6,000 Btuh, output is 4,00 Btuh. Two-inch diameter muffler (5Y66) is optional for 0 input model with a maximum vent pipe length of up to 9 ft. Three-inch diameter muffler (6A56) is optional for 0 input model with a minimum vent pipe length of 0 ft. 5Y66 (-inch) 6A56 (-inch) ML95DF / Page 7
8 HIGH ALTITUDE DERATE NOTE - Units may be installed at altitudes up to 0,000 ft. At altitudes above 450 ft. the unit must be derated to match the manifold pressure information shown below. Units installed at altitudes of 450 to 0,000 ft. require a pressure switch change. Units installed at altitudes of 750 to 0,000 ft. require an orifice change. See the Gas Heat Accessories table for ordering information. NOTE - This is the only permissible derate for these units. NOTE - In Canada, certification for installations at elevations over 4500 feet is the jurisdiction of local authorities. Input All Sizes OUTDOOR TERMINATION KIT USAGE Input Size Vent Pipe Diameter (in.) Flush Mount Kit 5W (US) 4 5W (CA) Innoflue is a registered trademark of Centrotherm Eco Systems. ML95DF / Page 8 Standard Terminations Wall Kit Wall Ring Kit inch inch inch G44 (US) 4 0G8 (CA) 44J40 (US) 4 8J0 (CA) 5F74 Field Fabricated Exhaust Accelerator Size Required Concentric Terminations Concentric Kit -/ inch inch inch 7M80 (US) 4 44W9 (CA) 69M9 (US) 4 44W9 (CA) 60L46 (US) 4 44W9 (CA) YES YES YES YES -/ in. YES / YES YES YES YES -/ in. YES YES YES YES YES -/ in. YES YES YES YES YES -/ in. YES / YES YES YES YES -/ in. YES YES YES YES YES -/ in. YES YES YES YES in YES YES -/ YES YES YES in YES YES YES YES YES in YES YES YES YES YES in YES YES -/ YES YES in YES YES YES YES in YES YES NOTE - Standard Terminations do not include any vent pipe or elbows external to the structure. Any vent pipe or elbows external to the structure must be included in total vent length calculations. See Vent Length Tables. Requires field provided -/ in. outdoor exhaust accelerator. Concentric Kits 7M80 and 44W9 include -/ in. outdoor exhaust accelerator, required when used with 045 and 070 input models. Accelerator is not used with 090, 0, 5 input models. Flush Mount Kit 5W and 5W includes -/ in. outdoor exhaust accelerator, required when used with 045, 070 and 090 input models. Accelerator is not used with 0 or 5 input models. Manifold Pressure in. w.g. Supply Line Gas Pressure ft ft ft ft ,000 ft. in. w.g. 0-0,000 ft. Natural LPG/Propane Termination Kits 0G8, 44W9, 44W9, 5W and 8J0 are certified to ULC S66 standard for use in Canada only. VENT LENGTHS - UNINSULATED EXHAUST PIPE IN UNCONDITIONED SPACE Winter Design Temperatures to F 0 to F 0 to 0 F Vent Pipe Diameter Unit Input Size Maximum Un-Insulated Exhaust Vent Length (ft.) PVC PolyPro PolyPro PolyPro PVC PVC InnoFlue InnoFlue InnoFlue PVC in / in. N/A 4 N/A 4 N/A 56 N/A in PolyPro InnoFlue in / in. 5 N/A N/A 4 N/A 4 N/A in. N/A N/A in. 5 N/A / in. N/A N/A 7 N/A 5 N/A N/A in. N/A N/A N/A N/A NOTE - Concentric terminations are equivalent to 5 ft. of straight pipe and should be included when measuring total pipe length. Refer to 99% Minimum Design Temperature table provided in the current edition of the ASHRAE Handbook-Fundamentals. PolyPro poly-propylene vent pipe is a registered trademark of DuraVent.
9 VENT LENGTHS - FEET STANDARD TERMINATION AT ELEVATION ft. Pipe Size in. -/ in. in. Input No. of 90 ELL N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A STANDARD TERMINATION ELEVATION 450-0,000 ft. Pipe Size in. -/ in. in. Input No. of 90 ELL N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A CONCENTRIC TERMINATION AT ELEVATION ft. Pipe Size in. -/ in. in. Input No. of 90 ELL N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A CONCENTRIC TERMINATION ELEVATION 450-0,000 ft. Pipe Size in. -/ in. in. Input No. of 90 ELL N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A ML95DF / Page 9
10 DIMENSIONS - INCHES (MM) 9/6 (4) Flue Condensate Trap Assembly Furnished for external field installation on either side of unit. (See installation instructions for additional information.) 7 (78) COMBUSTION INTAKE EXHAUST OUTLET -/6 (5) B RETURN OPENING 5 (7) -/4 (57) 9/6 (4) TOP VIEW A B FLOW 9/6 (4) (5) Front Panel 7-/4 (705) 9-7/6 (494) 9/6 (4) (88) (5) Either Side GAS PIPING INLET (Either Side) ELECTRICAL INLET (Either Side) CONDENSATE TRAP CONNECTION (Either Side) 9-/8 () Right 6-9/6 (67) Left 6-7/6 (6) Either Side 9 (9) Either Side /4 (9) C Supply Air /4 (9) 9-/4 (489) Supply Air /4 (9) FRONT VIEW SIDE VIEW Model No. A B C ML95DF045XP6B ML95DF070XP6B ML95DF090XP60C ML95DF0XP60C in. mm in. mm in. mm 7-/ / / / 495 ML95DF / Page 0
11 OPTIONAL ACCESSORY DIMENSIONS - INCHES (MM) DOWNFLOW FILTER CABINET B AND C WIDTH FURNACES (Two Filters) 0-/ (5) 7-/ (445) B Box (5) C Box FILTERS () 7-/ (445) 50-/ (8 ) (88) FURNACE FILTER ACCESS DOOR NOTE: Return Air Opening (W x D) B Box 6-/ x 9-5/8 (49 x 498) C Box 0 x 9-5/8 (508 x 498) ML95DF / Page
12 OPTIONAL ACCESSORY DIMENSIONS - INCHES (MM) DOWNFLOW COMBUSTIBLE FLOORING BASE -/ (8) SUPPLY OPENING DOWN FLOW FURNACE -/ (8) B 9-/6 (50) -/ (8) 7-/4 (69) -/6 (554) Front Of Furnace A -/ (8) TOP VIEW SIDE VIEW DOWNFLOW COMBUSTIBLE FLOORING BASE FLOOR OPENING Cabinet Width Catalog Number A B C in. mm in. mm in. mm B M60 9-9/ /6 4 8-/4 476 C M6 -/ /6 50 -/4 565 (559) C DIMENSIONS - INCHES (MM) - FURNACE/COIL COMBINED DIMENSIONS DOWNFLOW POSITION Furnace Width (88) Coil Height Overall Height Model Number Coil Width Furnace Width Coil Height Overall Height in. mm in. mm in. mm in. mm CR-4B-F 7-/ / 446 -/ /4 75 CR-0/6B-F 7-/ / / /8 48 CR-0/6C-F / /8 48 CR-48B-F 5 7-/ CR-48C-F CR-50/60C-F 4-/ 6 5-5/ /8 76 Coil Width ML95DF / Page
13 OPTIONAL ACCESSORY DIMENSIONS - INCHES (MM) FLUSH-MOUNT VENT TERMINATION KIT 5W (US) or 5W (CANADA) With or -/ in. (5 or 64 mm) PVC pipe Exhaust Intake (Behind Plate) Seal all openings (typical) With in. (76 mm) PVC pipe Exhaust Intake (Behind Plate) -/8 (60) (05) minimum (recommended) (5) PVC pipe (76) PVC pipe NOTE - PVC pipe and fittings are not furnished When required Use and must be field furnished. Field Provided -/ to in. (64 to 5 mm) Coupling -/ (64) PVC pipe MUFFLERS 5Y66 - -inch 6A56 - -inch -Inch - 8-/4 (476) -Inch - 5 (65) 4-/ (4) (Installed Vertically in the Exhaust Pipe) NOTE - Two-inch mufflers do not have reducers at each end. ML95DF / Page
14 OPTIONAL ACCESSORY DIMENSIONS - INCHES (MM) CONCENTRIC WALL TERMINATION APPLICATIONS CONCENTRIC ROOF TERMINATION APPLICATIONS EXHAUST OUTSIDE WALL INTAKE EXHAUST (05) Minimum Above Average Snow Accumulation FLASHING (Not Furnished) INTAKE CLAMP (Not Furnished) INTAKE (05) Minimum Above Grade or Average Snow Accumulation CLAMP SHEET METAL STRAP (Clamp and sheet metal strap must be field installed to support the weight of the termination kit.) GRADE ELBOW (Field Supplied) 7M80 / 69M9 / 44W9 inch kits 60L46 / 44W9 inch kits See Installation Instructions for additional information. Note - Field provided reducer may be required to adapt larger vent pipe size to termination. A B / (89) in. kits 4 / (4) in. kits TERMINATION ASSEMBLY (Furnished) 6 / (65) INTAKE 6 (5) EXHAUST Outdoor Exhaust Accelerator included with 7M80/44W9 Cat. No. 7M80 69M9 44W9 (Canada) A B in. mm in. mm / / / 94 60L46 8 7/8 987 / W9 (Canada) 6 / / 495 NOTE Typical illustration for dimensions only. Design may vary depending on kit ordered. WALL ASSEMBLY TERMINATION KIT RING KIT 5F74 inch (5 mm) See Installation Instructions for additional information. Note - Field provided reducer may be required to adapt larger vent pipe size to termination. DIRECT VENT APPLICATION NON-DIRECT VENT APPLICATION NOTE - EXHAUST PIPE SHOWN Kit Contains Enough Parts For Two Installations in. (05 mm) - in. (5 mm) dia. exhaust pipe 0 in. (508 mm) - in. (76 mm) dia. exhaust pipe maximum length without support in. (05 mm) - in. (5 mm) dia. exhaust pipe 0 in. (508 mm) - in. (76 mm) dia. exhaust pipe maximum length without support 8 in. (0 mm) minimum 6 in. (5 mm) maximum NOTE in. (05 mm) minimum height above average snow accumulation (from bottom of vent pipe). NOTE in. (05 mm) minimum height above average snow accumulation (from bottom of vent pipe). ML95DF / Page 4
15 OPTIONAL ACCESSORY DIMENSIONS - INCHES (MM) WALL TERMINATION KITS (CLOSE-COUPLE) EXTENDED VENT FOR GRADE CLEARANCE inch (5 mm) G44 (US) inch (76 mm) 44J40 (US) See Installation Instructions for additional information. Note - Field provided reducer may be required to adapt larger vent pipe size to termination. If Intake and Exhaust Pipe is less than in. (05 mm) above snow accumulation or other obstructions, field fabricated piping must be installed. WALL SUPPORT 8 (0) MIN. Between Ends of Exhaust and Intake Pipe (05) MAX. for (5) Dia. Exhaust 0 (508) MAX. for (76) Dia. Exhaust (05) INTAKE 6 (5) Maximum EXHAUST INTAKE 5 (7) / () FOAM INSULATION (Field Furnished) EXHAUST 8 (0) MIN. (05) Minimum Above Grade or Average Snow Accumulation GRADE 5-/ (40) (05) Minimum Above Grade or Average Snow Accumulation GRADE (05) MAX. for (5) Dia. Exhaust 0 (508) MAX. for (76) Dia. Exhaust WALL TERMINATION KITS (CLOSE-COUPLE) EXTENDED VENT FOR GRADE CLEARANCE inch (5 mm) 0G8 (WTK Canada) inch (76 mm) 8J0 (WTK Canada) See Installation Instructions for additional information. Note - Field provided reducer may be required to adapt larger vent pipe size to termination. If Intake and Exhaust Pipe is less than in. (05 mm) above snow accumulation or other obstructions, field fabricated piping must be installed. WALL SUPPORT INTAKE 6 (5) Maximum (05) MAX. for (5) Dia. Exhaust 0 (508) MAX. for (76) Dia. Exhaust 6 (5) MIN. EXHAUST INTAKE 5 (7) (05) / () FOAM INSULATION (Field Furnished) EXHAUST 6 (5) MIN. (05) Minimum Above Grade or Average Snow Accumulation GRADE (05) MAX. for (5) Dia. Exhaust 0 (508) MAX. for (76) Dia. Exhaust 5-/ (40) (05) Minimum Above Grade or Average Snow Accumulation GRADE ML95DF / Page 5
16 BLOWER DATA ML95DF045XP6B PERFORMANCE (Less Filter) External Static Pressure in. w.g. ML95DF070XP6B PERFORMANCE (Less Filter) External Static Pressure in. w.g. Air Volume / Watts at Various Blower Speeds High Air Volume / Watts at Various Blower Speeds High Medium- High Medium- High Medium- Low Medium- Low Low cfm Watts cfm Watts cfm Watts cfm Watts Low cfm Watts cfm Watts cfm Watts cfm Watts ML95DF090XP60C PERFORMANCE (Less Filter) External Static Pressure in. w.g. ML95DF0XP60C PERFORMANCE (Less Filter) External Static Pressure in. w.g. Air Volume / Watts at Various Blower Speeds High Air Volume / Watts at Various Blower Speeds High Medium- High Medium- High Medium- Low Medium- Low Low cfm Watts cfm Watts cfm Watts cfm Watts Low cfm Watts cfm Watts cfm Watts cfm Watts
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20 REVISIONS Sections Gas Heat Accessories Description of Change Updated High Pressure Switch Kit catalog numbers for all units. Visit us at For the latest technical information, Contact us at LENNOX NOTE - Due to Lennox ongoing commitment to quality, Specifications, Ratings and Dimensions subject to change without notice and without incurring liability. Improper installation, adjustment, alteration, service or maintenance can cause property damage or personal injury. Installation and service must be performed by a qualified installer and servicing agency. 08 Lennox Industries, Inc.
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